Time‐dependent coupled‐cluster theory

B Sverdrup Ofstad, E Aurbakken… - Wiley …, 2023 - Wiley Online Library
Recent years have witnessed an increasing interest in time‐dependent coupled‐cluster
(TDCC) theory for simulating laser‐driven electronic dynamics in atoms and molecules, and …

Accelerating real-time coupled cluster methods with single-precision arithmetic and adaptive numerical integration

Z Wang, BG Peyton, TD Crawford - Journal of Chemical Theory …, 2022 - ACS Publications
We explore the framework of a real-time coupled cluster method with a focus on improving
its computational efficiency. Propagation of the wave function via the time-dependent …

Linear and nonlinear optical properties from TDOMP2 theory

HE Kristiansen, BS Ofstad, E Hauge… - Journal of chemical …, 2022 - ACS Publications
We present a derivation of real-time (RT) time-dependent orbital-optimized Møller–Plesset
(TDOMP2) theory and its biorthogonal companion, time-dependent non-orthogonal OMP2 …

Time-dependent equation-of-motion coupled-cluster simulations with a defective Hamiltonian

SH Yuwono, BC Cooper, T Zhang, X Li… - The Journal of …, 2023 - pubs.aip.org
Simulations of laser-induced electron dynamics in a molecular system are performed using
time-dependent (TD) equation-of-motion (EOM) coupled-cluster (CC) theory. The target …

[HTML][HTML] Real-time equation-of-motion CC cumulant and CC Green's function simulations of photoemission spectra of water and water dimer

FD Vila, JJ Rehr, H Pathak, B Peng… - The Journal of …, 2022 - pubs.aip.org
Newly developed coupled-cluster (CC) methods enable simulations of ionization potentials
and spectral functions of molecular systems in a wide range of energy scales ranging from …

Making optical excitations visible–An exciton wavefunction extension to the time-dependent configuration interaction method

F Langkabel, PA Albrecht, A Bande, P Krause - Chemical Physics, 2022 - Elsevier
We report the animation and analysis of laser-driven many-electron dynamics by means of
time-dependent local densities and quantities derived from the one-particle transition …

Approximate Exponential Integrators for Time-Dependent Equation-of-Motion Coupled Cluster Theory

DB Williams-Young, SH Yuwono… - Journal of Chemical …, 2023 - ACS Publications
With a growing demand for time-domain simulations of correlated many-body systems, the
development of efficient and stable integration schemes for the time-dependent …

[HTML][HTML] Adiabatic extraction of nonlinear optical properties from real-time time-dependent electronic-structure theory

BS Ofstad, HE Kristiansen, E Aurbakken… - The Journal of …, 2023 - pubs.aip.org
Real-time simulations of laser-driven electron dynamics contain information about molecular
optical properties through all orders in response theory. These properties can be extracted …

Floquet time-dependent configuration interaction for modeling ultrafast electron dynamics

AS Durden, BG Levine - Journal of Chemical Theory and …, 2022 - ACS Publications
Time-dependent electronic structure methods are a valuable tool for simulating
spectroscopic experiments. Recent advances in time-dependent configuration interaction …

N-representability violations in truncated equation-of-motion coupled-cluster methods

SH Yuwono, AE DePrince - The Journal of Chemical Physics, 2023 - pubs.aip.org
One-electron reduced density matrices (1RDMs) from equation-of-motion (EOM) coupled-
cluster with single and double excitations (CCSD) calculations are analyzed to assess their …